Cooperative spontaneous emission from indistinguishable atoms in arbitrary motional quantum states

Damanet, François; Braun, Daniel; Martin, John P.

doi:10.1103/physreva.94.033838

Cited by 22 publications

(22 citation statements)

References 58 publications

(110 reference statements)

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“…For more than two two-level atoms the subradiant Dicke states are merely non-symmetric [1]; the corresponding states have been recently used to form a unimodular basis [24,25]. Various theoretical investigations have discussed the preparation [26][27][28][29][30][31][32][33][34][35][36][37][38][39] as well as the subradiant emission characteristics of non-symmetric Dicke states for larger atomic ensembles, either using a semiclassical theory [28,[33][34][35][36][37][38][39] or within a full quantum mechanical treatment [13,[30][31][32]. Very recently, the first experimental observation of retarded subradiant spontaneous decay for more than two emitters has been reported [40].…”

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confidence: 99%

Directional Dicke Subradiance with Nonclassical and Classical Light Sources

Bhatti¹,

Schneider²,

Oppel³

et al. 2018

Phys. Rev. Lett.

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We investigate Dicke subradiance of N≥2 distant quantum sources in free space, i.e., the spatial emission patterns of spontaneously radiating noninteracting multilevel atoms or multiphoton sources, prepared in totally antisymmetric states. We find that the radiated intensity is marked by a full suppression of spontaneous emission in particular directions. In resemblance to the analogous, yet inverted, superradiant emission profiles of N distant two-level atoms prepared in symmetric Dicke states, we call the corresponding emission patterns directional Dicke subradiance. We further derive that higher-order intensity correlations of the light emitted by statistically independent thermal light sources display the same directional Dicke subradiant behavior and show that it stems from the same interference phenomenon as in the case of quantum sources. We finally present measurements of directional Dicke subradiance for N=2,…,5 distant thermal light sources corroborating the theoretical findings.

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confidence: 99%

Directional Dicke Subradiance with Nonclassical and Classical Light Sources

Bhatti¹,

Schneider²,

Oppel³

et al. 2018

Phys. Rev. Lett.

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“…To begin, we study the paradigmatic example of superradiant light emission [3,120,[159][160][161][162][163][164], which can be generalized to include local phase-breaking terms, particularly relevant in large TLS ensembles and in solidstate implementations, in which sub-optimal experimental conditions spoil the simple picture of a single collective light emission coupling [77,109,116,117,121,160,[165][166][167][168][169][170][171][172][173][174][175][176][177][178][179] (see Ref. [56] for a more comprehensive list of references).…”

Section: A Superradiant Light Emissionmentioning

confidence: 99%

Open quantum systems with local and collective incoherent processes: Efficient numerical simulations using permutational invariance

et al. 2018

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The permutational invariance of identical two-level systems allows for an exponential reduction in the computational resources required to study the Lindblad dynamics of coupled spin-boson ensembles evolving under the effect of both local and collective noise. Here we take advantage of this speedup to study several important physical phenomena in the presence of local incoherent processes, in which each degree of freedom couples to its own reservoir. Assessing the robustness of collective effects against local dissipation is paramount to predict their presence in different physical implementations. We have developed an open-source library in Python, the Permutational-Invariant Quantum Solver (PIQS), which we use to study a variety of phenomena in driven-dissipative open quantum systems. We consider both local and collective incoherent processes in the weak, strong, and ultrastrong-coupling regimes. Using PIQS, we reproduced a series of known physical results concerning collective quantum effects and extended their study to the local driven-dissipative scenario. Our work addresses the robustness of various collective phenomena, e.g., spin squeezing, superradiance, quantum phase transitions, against local dissipation processes. arXiv:1805.05129v5 [quant-ph]

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“…Extended Dicke basis Moving away from the ideal configuration, it is necessary to generalize the superradiance ladder to describe the full dynamics [28]. In case of small deviation from ideal superradiance, it is worth working in an extended Dicke basis including Figure 2 presents the superradiance cascade along the extended Dicke basis.…”

Section: Pacs Numbersmentioning

confidence: 99%

“…Then, we work in the Schrödinger representation using relation (28) and taking benefit of trace conservation by circular permutation (Tr {ABC} = Tr {BCA} = Tr {CAB}). We obtain…”

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confidence: 99%

Cooperative emission in quantum plasmonic superradiance

et al. 2019

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Plasmonic superradiance originates from the plasmon mediated strong correlation that builds up between dipolar emitters coupled to a metal nanoparticle. This leads to a fast burst of emission so that plasmonic superradiance constitutes ultrafast and extremely bright optical nanosources of strong interest for integrated quantum nano-optics platforms. We elucidate the superradiance effect by establishing the dynamics of the system, including all features like the orientation of the dipoles, their distance to the particle and the number of active plasmon modes. We determine an optimal configuration for Purcell enhanced superradiance. We also show superradiance blockade at small distances. PACS numbers:Introduction. In a seminal work, Dicke discovered that a set of N e atoms radiate collectively when they occupy a subwavelength volume. Their emission is much faster (τ Ne = τ 1 /N e ) and stronger (I Ne = N 2 e I 1 ) than for independent atoms. This so-called superradiance originates from spontaneous phase-locking of the atomic dipoles through a same mode and is very similar to the building of cooperative emission in a laser amplifier [1]. Superradiant emission produces original states of light with applications such as narrow linewidth lasers [2] or quantum memories [3,4]. Single collective excitation of atoms in a nanofiber has been demonstrated [5] and superradiant-like behaviour was suggested in a plasmonics junction [6] or a nanocrystal [7], pushing further integration capabilities of quantum technologies. Putsovits and Shahbazyan identifyed plasmon enhanced collective emission for dipoles coupled to a metal nanoparticle (MNP) [8], considering a classical approach which however cannot describe the Dicke cascade at the origin of the cooperative emission. In this communication, taking benefit from recent advances on quantum plasmonics and open quantum systems [9-17], we derive a quantum approach for plasmonic superradiance and discuss the dy-Γtot/Γ0 325 93 2.7 Γtot/Γ1 -5.74 0.03TABLE I: Bright states with 6 emitters at 20 nm from a 30 nm MNP (ω0 = 2.77 eV). The field lines of LSP1 are superimposed to the brightest configuration. * Electronic address: gerard.colas-des-francs@u-bourgogne.frnamics of cooperative emission with particular attention to the role of the localized surface plasmons (LSP n , where n refer to the mode order).Single excitation superradiance We first consider single excitation superradiance that presents a classical analogue, facilitating the physical representation of the collective process. It reduces to an eigenvalue problem on the dipole moment d (i) of N e emitters located at rwhere G is the Green tensor in presence of the MNP, ω 0 the angular frequency of emission and k 0 = ω 0 /c. Γ 0 is the free-space dipolar decay rate. We assume a Drude behavior ε m (ω) = ε ∞ − ω 2 p /(ω 2 + iγ p ω) with ε ∞ = 6, ω p = 7.90 eV and γ p = 51 meV for silver. all LSPs LSP1 LSP2 LSP3 Γtot/Γ1 5.74 6 3 2.25TABLE II: Brightest states maximizing Γtot/Γ1 and considering single mode MNP response. The field lines ...

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Cooperative spontaneous emission from indistinguishable atoms in arbitrary motional quantum states

Cited by 22 publications

References 58 publications

Directional Dicke Subradiance with Nonclassical and Classical Light Sources

Directional Dicke Subradiance with Nonclassical and Classical Light Sources

Open quantum systems with local and collective incoherent processes: Efficient numerical simulations using permutational invariance

Cooperative emission in quantum plasmonic superradiance

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